Solve the problem. A circle is inscribed within an isosceles triangle such that the circle is tangent to all three sides as shown in the figure, with an angle 0 of 46. Using the fact that the radius r of the circle is perpendicular to any line tangent to the circle, find the value of r to the nearest tenth of an inch. 10 in. Select one: O a. 3.3 in. O b. 6in. O c. 2.8 in. O d. 4.2 in